CINCINNATI (AP) — Will Grimmer, a high school senior-to-be who played in the U.S. Open last month, shot a 5-under 66 in Wednesday’s second round of the Ohio Amateur to take a one-stroke lead over two-time winner Robert Gerwin.

Grimmer birdied four of the last five holes on the front side and then played the back in 1-under to stand at 4-under 138 at the tournament’s midpoint. Grimmer is an Ohio State verbal commitment who missed the cut at Pinehurst as one of the youngest Open qualifiers ever.

Fellow Cincinnati native Gerwin matched Grimmer’s 66 — the best rounds of the day at Coldstream Country Club.